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From: Roderick Johnstone <rmj@ast.cam.ac.uk>
Subject: Re: Memory allocation errors in hkgtigen in Fedora 28 and 30 beta
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Subject: Re: Memory allocation errors in hkgtigen in Fedora 28 and 30 beta
To: Pedro Rodriguez <xmmhelp@sciops.esa.int>
From: Roderick Johnstone <rmj@ast.cam.ac.uk>
Date: Thu, 18 Apr 2019 08:32:19 +0100
Hi

Thats fine. Thank you.

Roderick

On 17/04/2019 13:11, Pedro Rodriguez wrote:
> Hello,
> 
> your question has been forwarded to SAS developers for detailed analysis.
> 
> Please, note that due to Easter holidays the reply will not be available
before
> next week.
> 
> Pedro
> 
>> Full_Name: Roderick Johnstone
>> Submission from: (NULL) (193.147.152.102)
>>
>>
>> Hi
>>
>> This is a follow up to #84519.
>>
>> Running rgsproc on recent versions of Fedora linux causes hkgtigen to
fail
> with
>> the message:
>>
>> ** rgsproc::hkgtigen: fatal error (OutOfMemory), An out-of-memory
condition
> has
>> occurred: A component of the task `rgsproc' has tried to allocate more
> dynamic
>> memory than what is currently available in the system. A likely cause
of this
> is
>> an attempt to read and/or write a very large data set with the DAL in
its
>> high-memory-mode. In this case, please choose the low-memory-model (see
the
> DAL
>> documentation for details) and try again. If this does not help it
might be
> that
>> too many users are using the system or the swap space is insufficient.
>>
>> I don't think the system is really out of memory because the task runs
> correctly
>> on the same hardware with an earlier glibc. See details below...
>>
>> I've seen this on Fedora 28 and now on Fedora 30 beta which I am
evaluating
> with
>> both sas 16.1.0 and 17.0.0.
>>
>> The task works normally under Fedora 28 with glibc-2.27-35 or previous
> packages,
>> but fails with the more recent updates, eg glibc-2.27-38.
>>
>> My Fedora 30 testing system has glibc-2.29-9 on which it also fails.
>>
>> It is possible to work around the error by setting the environment
variable
>> MALLOC_CHECK_ to the value 1 or 2. Setting it to 0 still causes the
error.
>>
>> When setting MALLOC_CHECK_ to 1 or 2 the task rgsproc appears to run to
>> completion without any errors and the output files appear to be
reasonable.
>> There are no warning printed from glibc which is what might be expected
from
> if
>> there was a coding problem.
>>
>> Could someone look at this please?
>>
>> Thanks.
>>
>> Roderick Johnstone
>>
>> This is with:
>> SAS release: xmmsas_20180620_1732-17.0.0
>> Compiled on: Wed Jun 20 21:06:03 CEST 2018
>> Compiled by: sasbuild@sasbld03n
>> Platform   : Ubuntu16.04 64
>>
>>
> 
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> 

-- 
Roderick Johnstone                          Email: rmj@ast.cam.ac.uk
Institute of Astronomy                      Phone: +44 (0)1223 766656
Madingley Road, Cambridge CB3 0HA, UK       Mobile:+44 (0)7989 809095

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